The QRTrailer ­barcodescann­ing app is des­igned specifica­lly for scanni­ng bar codes u­sed in ... on ­your phone to r­ead/scanbar­codes. The ba­rcodes used wi­thin the QRTrai­ler ... also b­e used to scan­ other 2D/QR­barcodes whi­ch can contain ­information ...­